Assigm



(No Modl.)

M. E. CAMPFIELD.

BLANK POR MONKEY WRENGHES.

No. 285,796. Patented Oct. 2, 1883.

UNITED STATES PATENT OFFICE.

MATTHEW E. CAMPFIELD, OF CLEVELAND, OHIO, ASSIGN ORTO HIMSELF AND CQG.LUTTIFF, OF SAME PLACE.

BLANK FOR MON KEY-WRENCHES.

SPECIFICATION forming part of Letters Patent No. 285,796, dated october`1883.

Application filed April ll, 1883. (No model.)

To all whom t may concern,.-

Be it known that I, MATTHEW E. CAMP- FIELD, of Cleveland, in the countyof Cuya hoga and State of Ohio, have invented a new and usefulImprovement in Blanks for Forging the Hammcrdaws of Monkey-Wrenches, ofwhich the following is a specification.

This improvement relates yto machineforg ing of the hammer-jaws ofmonkey-wrenches; and it consists in first forming the head of the blankwith a narrow or decreased quantity of metal, where said head joins theshank and leaving the metal for forming the point and heel of the hammerenlarged, to be afterward wrought or beaten or pressed into nishedforminthe machine.

The object of forming the blank as stated is to facilitate the forgingof the heels and points, and relieving the excessive strain on the diesin resisting the expanding of the metal at the central part of the headWhile forging the head with the old form of blank. This form of blankrenders the forging of the heads with greater ease` and rapidity, andwith greater economy of wear and strain upon the dies.

In the accompanying drawings, Figure l represents a completely-forgedhead,and Fig. 2

represents my improved blank from which the said head is forged. Y

the required length and swage up a portion thereof by gripping the shankportion between gripping-dies and forcibly upsetting the other part Withsuitable heading-dies into the form seen in Fig. 2. These blanks arenext taken and placed in the machine for finishing the forging. Theshank is gripped in this machine a short distance from the head. Thenthe operation of forging the heel and point is performed 'by beatingdown the projecting metal a into the forming-die, and also the.projecting metal b is beaten or forced into the die for forming thepoint, as seen in dotted lines. This operation also upsets a part of theshank, forcing it into the head, and thus makes the edges and corners ofthe head square and full, as seen in Fig. l.

Having described my invention, I claim- The herein-described blank forforging the hammer-jaws of monkey-wrenches, consisting of the headhaving reduced portion at its junction with the shank and theenlargements a and b, as and for the purpose specified.

MATTHEW E. CAMPFIELD.

Titnessesz E. W. LAIRD,. GEO. XV. TTBBrrrs.

To form this blank I take a bar of metal of 3o

